Ingot-mold.



W. S. POTTER.

NGOT mow. APPLICATION FILEP JAN. 26 ISIS.

1,278,206. I Patented Sept. 10, 1918.

WITNESSES Z I daiwv TTORA/EYS WINFIELD s; POTTER, or PITTSBURGH,PENNSYLVANIA.

INeoT-MoLD.

Specification of Letters Patent. I

atented Sept. 10, 1918.

Applicationfiled January 26, 1915. Serial No. 4,429.

To all whom it may concern:

Be it-known that I, (VIN FIELD S. Forum, a citizen of the United States,residing. at No. 1317 Highland ave, city of Pittsburgh, county ofAllegheny, State of Pennsylvania,

' have invented certain new and useful Improvements in Ingot-Molds; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

' My invention relates'to certain new and I useful improvements in ingotmolds forthe forming of'ingots of manganese steel. and

other steels, said molds being of the kind known as inverted molds, that.is to say, ingot molds whose interior cross section increases from thebottom upwardly toward the zone of the sink head or riser.

In the accompanying drawing,

Figure 1 represents a vertical sectional view of an ingot mold embodyingthe invention; l Fig. 2 represents, on a larger scale, a sectional viewof a portion of the bottom joint thereof; r

Fig. 3 represents a vertical sectional view showing a modification;

' Fig. 4 represents a top plan view thereof.

Similar letters of reference indicate similar parts throughout theseveral views.

Referring to the drawing, a indicates an iron bottom plate upon whichthe inverted ingot mold b is supported. The interior of the mold may beof any suitable dimensions according to the size of the piece to bemanufactured. In order to hasten the freezing of the lower portion ofthe ingot, the walls of the mold are preferably made thickest at thebottom, and, on this account, taper from the bottom upwardly, asindicated,a suitable taper being say. one inch on each side for aningot. whichis twenty inches square at the bottom and of the relativeheight shown in the drawing, so that where the taper ends, at a heightshown by the letters (I, d, the ingot may have, for instance, a crosssectional area corresponding to 22 inches square. The iron bottom platea is provided wit a projection h, whose edge periphery cotiperates withthe inner edge of the lower opening of the mold, whereby the mold mayfit snugly over and upon the said projection h. In order that the partsmay. fit with a degree of snugness satisfactory in practice, theprojection his preferably rounded oif, as shown,

and thecooperating inner edge of the lower ope-n1 ng of the mold isgiven a correspondng curvature. The purpose of thus providmg for asuitably close fit between-the projection Z1. and the inner edge of thelower openlng of the mold is to insure against the formation of a fin ofsteel at the smaller and lower endof the poured ingot,- which -fin, 'if

thick, would prevent the subsequent stripping of themold-from the ingot,in which event, both the mold and the ingot would- 'have to be scrapped.By providing the profinning and locking of-the jection h, the ingot inthe mold is prevented, and it becomes entirely feasible to strip themold from the ingot by means of the ordinary large mechanical strippers,such as areused for. stripping molds of the ordinary type.

As a further precaution, asoft plastic roll of luting material,preferably of fire clay lmade plastic by oil, or-a mixture of fire clayand sand, made plastic by oil may be placed Y upon the upper surface ofthe bottom plate, .so as' to encompass the projection in; whereupon,when the mold is set down upon the bottom plate, the roll of lutingmaterial will be flattened out into a thin sheet, as indicated at c. Ingeneral, however, this luting material will be necessary only when theopposed surfaces of the mold and bottom'plate have become rough throughuse, for the reason that the mold, whose centering upon the bot; tomplate is facilitated by the projection 71. will make a sufficiently snugfit therewith to obviate any: substantial finnin Atthe upper part of the1561a, that is to say, at the. zone of the riser, a refractory head isprovided, which is preferably formed as follows: Bent rods t, or theirequivalents,

may be-used as-a crab or frame about which a core of drysand mixture, organister mixture is molded, and then dried in any, suitable core oven.The frame referred to is em ployed as a reinforcement of the core and ispreferably made to project slightly, as shown, both at the top and atthe bottom, so that when of theing'ot mold, as shown in Figs. 1 and 3,the weight of the core, together with any weights which may rest uponthe core is carthe core is placed on the corresponding ledge ricd tothe. ledge of the ingot mold, by the bent rods t or their equivalent.

When the refractory head 6 is placed 4 the ingot mold, a small quantityof any suitable luting material, as, for instance,a mix- 3 .ture of fireelav and oil, is placed on the tering projection making a snug fit withthe material sealing the joint between the bot-' tom plate and mold, theinner edge of said lower opening of the main body portion being curvedto fit the said rounded-off projection.

4:. In an ingot mold of the kind described, a refractory head consistingof a baked core of refractory material, containing a reinforcing frameprojecting through the lower surface of main body portion of the mo 5.In an ingot mold of the kind described,

1 a refractory plate or the refractory head and adapted to rest upon acorresponding ledge of the d head consisting of a baked core ofrefractory forcing frame projecting-from the lower surface of the reractory head and adapted to material, containing a reinrest upon thecorresponding ledge of the main body portion of the mold, and a coverplates forholding the refractory head in place during the pouring of theingot. v

In testimony whereof I aflixmy signature, in presence of two witnesses.

WINFIELD s. POTTER.

EMMA M.

